ietf-nntp AUTHINFO SASL protocol choices
Charles Lindsey
chl at clw.cs.man.ac.uk
Thu Mar 14 02:14:38 PST 2002
In <Pine.LNX.4.33.0203132236300.2129-100000 at marduk.litech.org> "Jeffrey M. Vinocur" <jeff at litech.org> writes:
>If we need to increase the line length limit, I suggest the following
>procedure:
>- Stan modifies the extensions mechanism to allow extensions to increase
> the line length limit. (Chris points out that we have precedent on
> this; see the relevant bit of the ESMTP spec below.) I'd be willing to
> suggest wording for this if necessary.
>- We get the SASL spec revised to require that when a mechanism is
> registered, the maximum size of an exchange be given. Chris can ask
> John Myers to include this in the current draft which revises RFC
> 2222; he doesn't think it will be a problem.
>- In the AUTHINFO SASL extension, we require an implementation to
> support a line length limit which is based on the max size of an
> exchange in the SASL mechanism (of those it implements) with the
> largest maximum, scaled up to account for base64 overhead.
OK, just to confirm my understanding, the LIST EXTENSIONS command might
return:
202 Extensions supported:
OVER
HDR
COMMANDLEN 998
SASL 400
.
where COMMANDLEN defaults to (and MUST be >= than) 512
and SASL * <base 64 factor> + <margin> MUST be <= COMMANDLEN
--
Charles H. Lindsey ---------At Home, doing my own thing------------------------
Tel: +44 161 436 6131 Fax: +44 161 436 6133 Web: http://www.cs.man.ac.uk/~chl
Email: chl at clw.cs.man.ac.uk Snail: 5 Clerewood Ave, CHEADLE, SK8 3JU, U.K.
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